EP1321246A2 - Outil à main motorisé fonctionnel - Google Patents

Outil à main motorisé fonctionnel Download PDF

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Publication number
EP1321246A2
EP1321246A2 EP02080449A EP02080449A EP1321246A2 EP 1321246 A2 EP1321246 A2 EP 1321246A2 EP 02080449 A EP02080449 A EP 02080449A EP 02080449 A EP02080449 A EP 02080449A EP 1321246 A2 EP1321246 A2 EP 1321246A2
Authority
EP
European Patent Office
Prior art keywords
power tool
grip
hand
held power
tool according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP02080449A
Other languages
German (de)
English (en)
Other versions
EP1321246A3 (fr
Inventor
Paolo Andriolo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dolking Ltd
Original Assignee
Dolking Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dolking Ltd filed Critical Dolking Ltd
Publication of EP1321246A2 publication Critical patent/EP1321246A2/fr
Publication of EP1321246A3 publication Critical patent/EP1321246A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles

Definitions

  • the present invention relates to a hand held power tool with an improved functionality.
  • the invention relates to an electrically driven power tool, such as an electric drill, screwdriver or a circular saw.
  • these machines generally comprise a main body, inside which there is an electric motor which drives the rotation of a chuck, on which a specific work tool is assembled.
  • the hand held power tool comprises, in particular, a grip 10, arranged in a substantially perpendicular direction to the longitudinal axis X of the main body 11 of the machine (which in the specific case illustrated in figure 1, coincides with the rotation axis of the tool-holder chuck).
  • a start and drive switch which is activated by means of a push-button 18 protruding from the external profile of the grip, which can move in a substantially perpendicular direction to the axis Y' of figure 1.
  • the accumulation of biomechanical stress can take place on the hand and arm, with a consequent increase in the risk of the onset of muscular-skeletal traumas, such as tendinitis, carpal tunnel syndrome, Raynaud syndrome, muscular pain, tenosynivitis or epicondylitis.
  • An objective of the present invention is therefore to eliminate the technical drawbacks reported and, in particular, to produce a hand held power tool with an improved functionality, which allows the user to apply human strength more efficiently, whatever type of grip is adopted.
  • Another objective of the present invention is to indicate a hand held power tool with an improved functionality, which allows the user to maintain, during use, a so-called “neutral posture" of the hand and forearm, known to ergonomists as being the most advantageous in terms of comfort and prevention of a series of pathologies connected with the use of power tools.
  • An additional objective of the invention is to produce a hand held power tool with an improved functionality, which maintains safety and reliability characteristics, with respect to hand held power tools of the traditional type, without jeopardizing encumbrance, which remains equivalent to that of traditional machines.
  • the hand held power tool according to the invention can be advantageously distinguished by the particular configuration of the grip and accessories relating thereto, so as to allow much a more comfortable and less tiring use, with a consequent increase in work productivity and efficiency, with a drastic reduction in fatigue on the part of the user.
  • the "neutral posture" of the hand and forearm is obtained, in particular, when the fingers are slightly bent on the three articulations (with a bending degree which gradually increases from the index finger to the little finger), the thumb is in semi-opposition with respect to the other fingers and the wrist of the forearm is slightly stretched with a mild inclination of the ulna.
  • 11 indicates a main body of a hand held power tool, in particular a power tool, inside which the electric activation motor 13 of the tool, the motor commutator, generally indicated with 14, and the relative coiling 15, are mainly housed.
  • the power tool consists of an electric drill or a screwdriver drill or pneumatic drill or hammer
  • the power tool on the external surface above the main body 11 of the drill, there is a longitudinal groove 20, which facilitates a firmer and safer hold of the power tool.
  • This kind of hold particularly preferred by experts in the field as it enables a force to be applied in a direction which is parallel to the rotation axis of the motor allowing a reduction in the torque during use, consists of the possibility of inserting the index finger 21 of the hand 22 into the groove 20 and the mid-finger 26 in a parallel position, resting the thumb 23, in semi-opposition, in correspondence with the upper portion of the body 11 (see, in particular, figure 4 for a rapid verification), so as to exert greater force on the tool and have a better control of the machine, with respect to a conventional hold, of the "pistol" type (schematically illustrated in figure 3).
  • the hand held power tool also comprises a grip 16, which, according to the invention, has a particular configuration, suitable for maintaining optimum ergonomic conditions for the user, and which internally houses a main body of the start and/or drive switch, indicated with 17, activated by the pressure of a push-button 18, which protrudes from the profile of the grip 16 (towards the inside of the machine), making it accessible to the user's hand.
  • a grip 16 which, according to the invention, has a particular configuration, suitable for maintaining optimum ergonomic conditions for the user, and which internally houses a main body of the start and/or drive switch, indicated with 17, activated by the pressure of a push-button 18, which protrudes from the profile of the grip 16 (towards the inside of the machine), making it accessible to the user's hand.
  • Some power tools also have a stop device, generally indicated with 19 in figure 1, which allows the push-button 18 to be kept in position without having to maintain the constant pressure of the fingers.
  • a suitable angle of the grip 16 is created, with respect to the main body 11, to favour a correct positioning of the hand and forearm of the user during use.
  • the hand held power tool, object of the present invention has a grip 16 having an median axis Y inclined, with respect to the longitudinal axis X of the body 11, at an obtuse angle ⁇ , substantially corresponding to the angle formed by the hand with the forearm in the so-called "neutral posture", known to ergonomists as being the most advantageous in terms of comfort and prevention of a series of pathologies associated with the use of power tools.
  • This configuration provides an extremely convenient, comfortable, safe and efficient grip of the hand held power tool during work execution; in particular, the structural conformation of the grip 16 allows a force to be exerted, which is regularly distributed between the various muscles of the human body, and also allows minimum stress, with respect to that exerted on power tool grips of the traditional type.
  • Figure 2 illustrates in detail the construction of the angle ⁇ ; in this specific case, the inclination of the median axis Y of the grip 16, with respect to the longitudinal axis X of the body 11, is obtained by constructing a parallel to the line Z passing through points A (intersection point between the external profile of the grip 16 and longitudinal axis X) and B (point lying on the external profile of the grip 16, which is at a distance L, equal to at least 100 mm, from the longitudinal axis X).
  • the particular inclination of the grip 16 forms an additional advantageous characteristic of the hand held power tool according to the invention.
  • This inclined configuration in fact, allows the push-button 18 of the switch 17 to move in a direction (indicated by the arrow P of figure 2) which is substantially perpendicular to the median axis Y of the grip 16; this enables the user to maneuver the activation button 18 with much less force than is necessary with drive push-buttons of the traditional type, which are compelled to move in a substantially parallel direction to the axis X (see figure 1 for a rapid comparison).
  • the distance, indicated with L1 in figure 2 between the terminal surface of the commutator 14 of the electric motor 13 and the geometric centre C of the main body of the switch 17 is less than a pre-fixed size which, in illustrative and preferred but non-limiting embodiments of the present invention, is 70 mm.
  • Figures 3 and 4 specifically show the activation direction of the push-button of the switch and inclination of the grip 16; these figures also clearly illustrate how force and energy are applied by the human body to the power tool as efficiently as possible, as the application direction of said force is always parallel to the longitudinal axis X (corresponding to the rotation axis of the motor 13), both in the "pistol” type of grip (figure 3, in which the force application direction is indicated by the line R), and in the "upper” type of grip, with two fingers, preferred by experts (figure 4, in which the force application direction is indicated by the line S).
  • the push-button 18 is situated in the upper part of the grip 16, so that the line T (see figure 2), which extends to the lower part of the motor 13, crosses the main body of the switch 17.
  • This particular arrangement of the switch 17 also avoids jeopardizing the encumbrance, which is comparable to that of power tools of the traditional type, at the same time maintaining an adequate inclination of the grip 16, in order to obtain the advantages of comfort and reduction in fatigue of the operator during use, as mentioned above.
  • the arrangement of the components present inside the hand held power tool is also designed in such a way as to avoid encumbrance of the power tool, above all in correspondence with the interface existing between the main body 11 and grip 16; compactness and reduction in encumbrance are, in fact, among the prerogatives most widely requested by the market.
  • the grip 16 has, in its lower part, an enlarged terminal section 27, which is specifically shaped for blocking the hand holding the power tool in position (in the case of a "pistol” hold), thus allowing an even firmer and safer grip.
  • the inclined conformation of the grip 16 combined with its particular dimensions, surface geometry and transversal sections, allows a uniform distribution of the surface pressure on a wide area of the hand during the use of the hand held power tool.
  • the machine according to the invention is consequently comfortable for the user and allows an adequate force to be applied, maintaining constant control of the tool; in addition, the conformation of the grip, as already mentioned, prevents the onset of traumas of the muscular-skeletal type.
  • the diameter of the grip 16 is also optimized so as to ensure a uniform contribution of all fingers to the safety of the hold; the correct size of said diameter is obtained from experimental studies and biomechanical force measurements applied by the fingers and relative moments and is a compromise between an excessive bending angle of the five fingers in holding position (reduced diameter) and a non-adequate use of all fingers for their complete adhesion to the grip (due to an excessively large diameter).
  • a grip 16 has been projected with an elliptical section, having a longitudinal line 28 on both opposite external surfaces; this line 28 is sufficiently prominent as to be instantly perceived upon touch, even in the present of work-gloves, to ensure a completely tridimensional perception on the part of the operator of the position of his hand on the grip 16, thus increasing accuracy of use of the hand held power tool, above all if used for precision works.
  • the surface of the grip must not be too smooth, allowing a symptomatic tactile contact and contributing to attenuating the vibrations transmitted by the machine to the hand and forearm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)
  • Harvester Elements (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP02080449A 2001-12-21 2002-12-17 Outil à main motorisé fonctionnel Withdrawn EP1321246A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI20010264 2001-12-21
IT2001VI000264A ITVI20010264A1 (it) 2001-12-21 2001-12-21 Macchina utensile a funzionalita' migliorata

Publications (2)

Publication Number Publication Date
EP1321246A2 true EP1321246A2 (fr) 2003-06-25
EP1321246A3 EP1321246A3 (fr) 2004-06-16

Family

ID=11461725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02080449A Withdrawn EP1321246A3 (fr) 2001-12-21 2002-12-17 Outil à main motorisé fonctionnel

Country Status (3)

Country Link
US (1) US20030146008A1 (fr)
EP (1) EP1321246A3 (fr)
IT (1) ITVI20010264A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2396577A (en) * 2002-12-23 2004-06-30 Milwaukee Electric Tool Corp Trigger assembly for a power tool
JP2008284617A (ja) * 2007-05-15 2008-11-27 Makita Corp 可搬型動力工具
JP2009248222A (ja) * 2008-04-03 2009-10-29 Makita Corp 可搬型動力工具
EP2147754A4 (fr) * 2007-05-15 2010-11-03 Makita Corp Outil électrique portatif
EP2364818A1 (fr) * 2010-03-08 2011-09-14 HILTI Aktiengesellschaft Machine-outil manuelle
USD646947S1 (en) 2010-08-13 2011-10-18 Black & Decker Inc. Drill
US12233523B2 (en) 2020-12-07 2025-02-25 Black & Decker Inc. Power tool with multiple modes of operation and ergonomic handgrip

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD526178S1 (en) * 2003-01-24 2006-08-08 Robert Bosch Gmbh Electric drill
USD538126S1 (en) * 2003-08-29 2007-03-13 Robert Bosch Gmbh Hammer drill with work piece holder
AU155884S (en) * 2003-08-29 2004-07-14 Bosch Gmbh Robert Impact drilling machine
CA106161S (en) 2003-09-10 2005-06-09 Chervon Internat Trading Co Ltd Drill
USD502376S1 (en) * 2003-09-29 2005-03-01 Positec Power Tools (Suzhou) Co., Limited Impact drill
CA108959S (en) * 2004-05-13 2005-12-02 Nanjing Chervon Ind Co Ltd Drill
JP4456499B2 (ja) * 2005-02-10 2010-04-28 株式会社マキタ 作業工具
CA113638S (en) * 2005-06-17 2007-03-30 Nanjing Chervon Ind Co Ltd Electric drill
USD533420S1 (en) * 2005-11-03 2006-12-12 Gmca Pty Limited Power tool drill
US20070221391A1 (en) * 2006-03-27 2007-09-27 Pospisil Kenneth G Apparatus, accessories and/or controls attached to a drill of any sort for screwing, impacting and/or drilling into anything; including different position's and controls for grasping or positioning a drill of any sort to function
JP5467757B2 (ja) * 2008-11-14 2014-04-09 株式会社マキタ 作業工具
USD609544S1 (en) 2009-02-24 2010-02-09 Black & Decker, Inc. Drill driver
USD617622S1 (en) 2009-09-30 2010-06-15 Black & Decker Inc. Impact driver
USD626394S1 (en) 2010-02-04 2010-11-02 Black & Decker Inc. Drill
WO2013032374A1 (fr) * 2011-08-26 2013-03-07 Husqvarna Ab Ensemble guide et commande
DE202013103023U1 (de) * 2012-07-14 2013-10-04 Hitachi Koki Co., Ltd. Elektrowerkzeug
DE102013207689A1 (de) * 2013-04-26 2014-10-30 Robert Bosch Gmbh Handwerkzeugmaschine
JP6085225B2 (ja) 2013-06-27 2017-02-22 株式会社マキタ ネジ締め電動工具
US9559628B2 (en) 2013-10-25 2017-01-31 Black & Decker Inc. Handheld power tool with compact AC switch
US20150151424A1 (en) * 2013-10-29 2015-06-04 Black & Decker Inc. Power tool with ergonomic handgrip
JP6246649B2 (ja) * 2014-04-10 2017-12-13 株式会社マキタ 電動工具
EP3566176B1 (fr) * 2017-01-04 2025-10-29 Interlink Electronics, Inc. Détection multimodale pour interface utilisateur d'outil électrique
US11498198B2 (en) * 2019-08-20 2022-11-15 The Boeing Company Ergonomic handle for a power tool
US20220009072A1 (en) * 2020-07-09 2022-01-13 Snap-On Incorporated Ergonomic housing for a power tool
TWM635552U (zh) * 2022-01-11 2022-12-21 鑽全實業股份有限公司 研磨工具及其機殼

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4330093A (en) * 1980-08-08 1982-05-18 Western Electric Company, Inc. Thumb-controlled hand-held tool
US4448098A (en) * 1982-03-10 1984-05-15 Katsuyuki Totsu Electrically driven screw-driver
US4759240A (en) * 1987-04-28 1988-07-26 Samson Lin Electric screwdriver with adjustable joint
US4962681A (en) * 1988-11-09 1990-10-16 Yang Tai Her Modular manual electric appliance
DE19605202C1 (de) * 1996-02-13 1997-09-18 Atlas Copco Elektrowerkzeuge Elektrowerkzeugmaschine mit Umschalteinrichtung für Rechts-/Linkslauf
US6102134A (en) * 1998-10-16 2000-08-15 Black & Decker Inc. Two-position screwdriver
USD462593S1 (en) * 2001-06-18 2002-09-10 Toolovation, Llc Battery powered screwdriver
US6364033B1 (en) * 2001-08-27 2002-04-02 Techtronic Industries Co. Ltd. Portable electric tool
US6688407B2 (en) * 2001-10-10 2004-02-10 Porter-Cable/Delta Belt clip for hand-held power tools
US7143841B2 (en) * 2001-10-10 2006-12-05 Black & Decker Inc. Belt clip for hand-held power tools

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2396577A (en) * 2002-12-23 2004-06-30 Milwaukee Electric Tool Corp Trigger assembly for a power tool
US7015409B2 (en) 2002-12-23 2006-03-21 Milwaukee Electric Tool Corporation Power tool trigger
GB2396577B (en) * 2002-12-23 2006-07-19 Milwaukee Electric Tool Corp Power tool trigger
US8657029B2 (en) 2007-05-15 2014-02-25 Makita Corporation Portable power tool with grooved hand grip
EP2147754A4 (fr) * 2007-05-15 2010-11-03 Makita Corp Outil électrique portatif
US8261852B2 (en) 2007-05-15 2012-09-11 Makita Corporation Portable power tool
JP2008284617A (ja) * 2007-05-15 2008-11-27 Makita Corp 可搬型動力工具
EP2647474A3 (fr) * 2007-05-15 2016-04-06 Makita Corporation Outil électrique portable
US9550290B2 (en) 2007-05-15 2017-01-24 Makita Corporation Portable power tool with improved grip portion
JP2009248222A (ja) * 2008-04-03 2009-10-29 Makita Corp 可搬型動力工具
EP2364818A1 (fr) * 2010-03-08 2011-09-14 HILTI Aktiengesellschaft Machine-outil manuelle
USD646947S1 (en) 2010-08-13 2011-10-18 Black & Decker Inc. Drill
US12233523B2 (en) 2020-12-07 2025-02-25 Black & Decker Inc. Power tool with multiple modes of operation and ergonomic handgrip

Also Published As

Publication number Publication date
EP1321246A3 (fr) 2004-06-16
US20030146008A1 (en) 2003-08-07
ITVI20010264A1 (it) 2003-06-21

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